Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-30
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-30 is a genuine double-acting aluminum-barrel mini cylinder with a Ø40mm bore, a 350mm nominal stroke and a rear adjustable-stroke stopper — trim up to 30mm for a usable window of 320–350mm. Adjustable air cushion (both ends).
- BoreØ40 mm
- Stroke350 mm
- Adjustable320–350 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-30
The AirTAC MBLCJ40X350-30 is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and an adjustable air cushion at both ends. The rear stopper allows you to trim up to 30 mm of travel, providing a usable end-position window of 320 to 350 mm. Driven through a G1/4 port, it delivers 628 N of push force and 528 N of pull force at 0.5 MPa, making it well-suited for moving moderate loads over long distances.
Unlike the standard MBLJ which relies on a fixed rubber bumper, this model uses screw-tunable pneumatic cushioning to decelerate heavy masses smoothly at the stroke extremes, protecting the end covers. The riveted rolling-packed barrel and heterogeneous grease-retaining piston seal minimize friction, while the 20 um hard-chrome plated carbon-steel rod resists scuffing. Note that this specific SKU lacks a built-in magnet (-S), so it cannot accommodate a CMSG, DMSG, or EMSG position sensor. The rear travel stopper sets the end point but does not mechanically lock or hold the load in place.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-30 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-30 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø40 mm |
| Nominal stroke | 350 mm |
| Adjustable window | 320–350 mm (trim 30 mm) |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable air cushion (both ends) |
| Max standard stroke | Up to 500 mm |
The rear stopper sets the end position — it is a travel stop, not a lock. Overall length = A + 2 × stroke + adjustable stroke. MBLJ/MBLCJ mounting is Basic / FA / LB only (no SDB, no back-cover code). Thread options: PT / G / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a margin.
Model Code: Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-30
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 40 | Bore size in mm. |
| ×350 | Nominal stroke length in mm. |
| -30 | Adjustable-stroke amount (mm you can trim at the rear). |
| S | Optional built-in magnet for a CMSG/DMSG/EMSG sensor switch. |
Related: MBLJ (adjustable stroke, fixed bumper), MBL (fixed stroke), MBLD (double rod).
Where the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-30 Is Used
Textile Loom Beam Indexing
Drives the 350 mm extraction stroke for heavy weaving beams, using the 30 mm rear travel trim to perfectly align the beam end with the coupling chuck without shimming.
Conveyor Pallet Diverter
Pushes 5 kg pallets across a transfer belt at high speed, relying on the adjustable air cushion to prevent end-cap impact damage during 628 N force strokes.
Packaging Carton Flap Folder
Extends fully to tuck large corrugated carton flaps, where the 528 N pull force reliably retracts the 16 mm rod against spring-hinged cardboard resistance.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-30 the Right Cylinder?
If 628 N of push force at 0.5 MPa is too much, step down to the 32 mm bore, which yields 402 N. If your application requires more thrust, step up to the 50 mm bore, providing 981 N. The 350 mm stroke falls well within the 500 mm maximum standard stroke limit for this 40 mm bore, meaning no non-standard machining is required. However, at this extended stroke length, the Ø16 mm rod is highly susceptible to side-load bending; an external guide rail must be used to prevent premature seal failure.
Choose this MBLCJ over the MBLJ when you need tunable end-of-stroke deceleration instead of a fixed bumper, or over the MBLC when your machine timing requires a 320-350 mm adjustable end-position window rather than a fixed 350 mm stop. Remember that the pneumatic cushion only slows the piston; it does not lock the rod, so external locking mechanisms are required for strict position holding. Mounting is limited to Basic, FA (flange), or LB (foot) brackets—there is no SDB pivot or back-cover option. For a direct replacement, match the 40 mm bore, 350 mm stroke, 30 mm adjust code, G1/4 port, PT thread form, and confirm no magnet is fitted.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Adjustable window fits your end position
- ✓ Adjuster is a travel stop, not a lock
- ✓ Magnet (S) for sensors?
- ✓ Side load — add a guide on long strokes
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Set the rear stopper for the end position (a travel stop, not a lock).
- check Avoid side load; add an external guide on long strokes.
- check Mounting: Basic / FA flange / LB foot (no SDB, no back-cover code).
- check Installation by qualified personnel per AirTAC docs.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-30 FAQ
At 0.5 MPa, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 880 N. The maximum theoretical force is 128 kgf at 1.0 MPa.
No. This specific SKU does not have the -S code, meaning it lacks a built-in magnet. You cannot mount an AirTAC CMSG (reed), DMSG, or EMSG (electronic) sensor switch to it. You would need the MBLCJ40X350-30S variant for position detection.
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